/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
/*	All Rights Reserved  	*/

/*
 * Portions of this source code were derived from Berkeley 4.3 BSD
 * under license from the Regents of the University of California.
 */

#include "lint.h"
#include <sys/types.h>
#include <sys/systeminfo.h>
#include <stdlib.h>

long
gethostid(void)
{
	char name[HW_HOSTID_LEN], *end;
	unsigned long hostid;

	/*
	 * HW_INVALID_HOSTID must be cast to an int to ensure that it's sign
	 * extended to 64 bits in 64-bit builds.
	 */
	if (sysinfo(SI_HW_SERIAL, name, sizeof (name)) == -1)
		return ((int)HW_INVALID_HOSTID);
	hostid = strtoul(name, &end, 10);
	if (end == name)
		return ((int)HW_INVALID_HOSTID);
	return ((long)hostid);
}
